Nail, spike, &amp;c.



No. 731,896. PATENTED JUNE 23, 1903.

- 0. HASS.

NAIL, SPIKE, 8w. APPLIOATION FILED mm. 24, 1902.

170 MODEL.

Patented June 23, 1903.

CAESAR HASS, OF LONDON, ENGLAND.

NAIL, SPIKE, 84.0.

SPECIFICATION forming part of Letters Patent N 0. 731,896, dated June23,1903.

Application filed March 24,1902 Serial No. 99,729; (No model.)

To all whom it maly concern:

Be it known that I, CAESAR HASS, a citizen of the United States ofAmerica, residing at 11 Dod street, Limehouse, London, England, haveinvented certain new and useful Improvementsin Nails, Spikes, and otherDriven I-Ioldfast Devices, of which the following is a specification.

The object of this invention is 'an improved construction of nails,spikes, and other driven holdfast devices, and is specially applicableto that class of nail known as a wire or French nail.

In the manufacture of many wooden articles the nails have to be drivenin close to the edge of the wood, and as they are atpresent constructedsplitting of the wood is a constant occurrence, because the nail has tofind its way between the grain of the wood instead of cutting its waythrough. Now by my invention I obviate this splitting of the wood bymaking the wire nail with three, four, or more grooves running from thestem to a point constituting the point of the nail,

the grooves being of such a character that three, four, or more cuttingedges are formed of concave formation running from the central point tothe outsideof the nail. Thus I have a nail with a centralpoint whichfirst nail when driven home without fear of split 35 enters the wood,when the concave chisel or cutting edges take upthe work and cut intothe wood, cause the fibers to be pressed into the body of the wood, andform a grip to the ting. The outside edges of the concave cutting edgemay be swaged slightly wider than the diameter of the nail.

The annexed drawings clearly show several ways of carrying my inventioninto effect.

Figure 1 is an elevation of a portion of a wire nail having four cuttingedges and grooves and one long central point. Fig. 2

is a section on the line a a of Fig. 1. Fig. 3 I is a plan of Fig. l,and Fig. 4 is a part-sec- 45 i 1, through the line b b of Fig. 3.

tional elevation-of a portion of a nailshown Fig. 5 is an elevation of aportion of a nail of the construction shown in the previous figures, butwith thecutting edges swaged out slightly, so that the outer ends'of thecutting edges d d of Fig. .9. three-grooved nail, but showing thegrooves,

are of a slightly-larger diameter than the body of the nail. Fig. 6 isan elevation of a complete nail. Fig. 7 is an elevation of a portion ofa nail having three cutting edges and grooves and a short point. Fig.Sis a sectionon line a c of Fig. 7. Fig. 9 is a plan, and Fig. 10 apart-sectional elevation of a portion of the nail shown in Fig. 7 on theline Fig. 11 is an elevation of a the ends of the cutting edge beingswaged slightly, so that they take a diameter slightly larger than thebody of the nail.

According to Figs. 1 to 6 the grooves l are substantially concaved andcut from the body of the nail 2 to a point adjacent to the end of thecentral point 3, and the point 3 is of a long character; but at Figs. 7to 11 the grooves are out on the curve from the body,

of the nail 2 to the central point 3, which is of a short character. Theconcaved grooves 1 on the end of the nail are in continuity-that is tosay, each groove merges into the otheror, in other words, the end of thenail is cut away to form an endless succession of concaved grooves. Asbefore explained, the cut ting edges 4 formed by the grooving are ofconcave form, the degree of curve being determined by the size, and suchcutting edges may be of a sharp or blunt character, according to thequality of themetal employed for V the nail. If the quality be of a hardcharacter, the cutting edges may be fairly sharp; but if of a softcharacter the cutting edges may be somewhat blunt, so that in using thenail for hard or knotted wood the cutting edges will not be destroyed.

In the use of the nail for wood the sharp central point is simply stuckby the carpenter into the wood, and it will hold itself there inposition for being driven home by the hammer without the necessity ofthe nail being held by the carpenter during the striking operation withthe hammer.

By slightly swaging out the ends of the 5 cutting edges, and therebyforming such ends of a larger diameter than the body of the nail, allthe work of cutting through the woodis done by the cutting edges,causing the fibers of the wood which are displaced to properly andefficiently grip the stem of the nail, and thus securely holding it. inposition during the entire portion of its length.

, From the foregoing it will be evident that the essential feature ofthe invention is the vided with concaved grooves in continuity, concavedcutting edges separating the grooves and a central sharp point.

2. A nail or the like having one end provided with grooves incontinuity, cutting edges separating the grooves and an extended sharppoint.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

CAESAR HA SS.

Witnesses:

RICHARD CoXE GARDNER, PERCY E. MATTooKs.

